DCT e-track, Руководство пользователя, Страница: 31 / 212

1.4. INSTALLATION
1.3.6 GPS module
•
Supports SBAS (WAAS, EGNOS).
•
Sensitivity: -150 dBm Tracking, -142 dBm Acquisition.
•
Protocol: TAIP(ASCII).
•
Frequency: L1 type (1575.42 MHz). C/A code.
•
Channels: 12 channel simultaneous operation.
•
Update rate: 1Hz.
•
Accuracy:
Horizontal: < 2.5 meters (50%), < 5 meters (90%)
[ SBAS ] : < 2 meters (50%), < 4 meters (90%)
Velocity: 0.06 m/sec.
PPS: +/-100 nanoseconds RMS.
•
Acquisition:
Reacquisition: 2 sec.
Hot Start: 3.1 sec.
Warm Start: 35 sec.
Cold Start (TTFF): 39 sec.
Out of the box: 41 sec.
1.4 Installation
e-track
TM
’s can be installed in any location inside a vehicle, a cargo
box or any other inside location, as long as some environmental con-
ditions are met:
• Fair sky view for better GPS performance.
•
No exposure to water.
• No exposure to direct sun light.
•
Away from excessive heat sources like a running engine or an
exhaust’s path.
•
Away from excessive cold sources like a truck’s refrigerator or
AC system.
•
Not attached to a highly vibrating structure.
The unit’s location/position can be such that it remains hidden. The
LEDs indicators do not have to be visible but it is recommended
some access to them for failure/diagnostics situations. The same rec-
ommendation holds for physical access to the unit’s communications
port and button.
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